1 /* $OpenBSD: grid-view.c,v 1.33 2019/08/16 08:52:25 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <string.h> 22 23 #include "tmux.h" 24 25 /* 26 * Grid view functions. These work using coordinates relative to the visible 27 * screen area. 28 */ 29 30 #define grid_view_x(gd, x) (x) 31 #define grid_view_y(gd, y) ((gd)->hsize + (y)) 32 33 /* Get cell. */ 34 void 35 grid_view_get_cell(struct grid *gd, u_int px, u_int py, struct grid_cell *gc) 36 { 37 grid_get_cell(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc); 38 } 39 40 /* Set cell. */ 41 void 42 grid_view_set_cell(struct grid *gd, u_int px, u_int py, 43 const struct grid_cell *gc) 44 { 45 grid_set_cell(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc); 46 } 47 48 /* Set cells. */ 49 void 50 grid_view_set_cells(struct grid *gd, u_int px, u_int py, 51 const struct grid_cell *gc, const char *s, size_t slen) 52 { 53 grid_set_cells(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc, s, 54 slen); 55 } 56 57 /* Clear into history. */ 58 void 59 grid_view_clear_history(struct grid *gd, u_int bg) 60 { 61 struct grid_line *gl; 62 u_int yy, last; 63 64 /* Find the last used line. */ 65 last = 0; 66 for (yy = 0; yy < gd->sy; yy++) { 67 gl = grid_get_line(gd, grid_view_y(gd, yy)); 68 if (gl->cellused != 0) 69 last = yy + 1; 70 } 71 if (last == 0) { 72 grid_view_clear(gd, 0, 0, gd->sx, gd->sy, bg); 73 return; 74 } 75 76 /* Scroll the lines into the history. */ 77 for (yy = 0; yy < last; yy++) { 78 grid_collect_history(gd); 79 grid_scroll_history(gd, bg); 80 } 81 if (last < gd->sy) 82 grid_view_clear(gd, 0, 0, gd->sx, gd->sy - last, bg); 83 gd->hscrolled = 0; 84 } 85 86 /* Clear area. */ 87 void 88 grid_view_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, 89 u_int bg) 90 { 91 px = grid_view_x(gd, px); 92 py = grid_view_y(gd, py); 93 94 grid_clear(gd, px, py, nx, ny, bg); 95 } 96 97 /* Scroll region up. */ 98 void 99 grid_view_scroll_region_up(struct grid *gd, u_int rupper, u_int rlower, 100 u_int bg) 101 { 102 if (gd->flags & GRID_HISTORY) { 103 grid_collect_history(gd); 104 if (rupper == 0 && rlower == gd->sy - 1) 105 grid_scroll_history(gd, bg); 106 else { 107 rupper = grid_view_y(gd, rupper); 108 rlower = grid_view_y(gd, rlower); 109 grid_scroll_history_region(gd, rupper, rlower, bg); 110 } 111 } else { 112 rupper = grid_view_y(gd, rupper); 113 rlower = grid_view_y(gd, rlower); 114 grid_move_lines(gd, rupper, rupper + 1, rlower - rupper, bg); 115 } 116 } 117 118 /* Scroll region down. */ 119 void 120 grid_view_scroll_region_down(struct grid *gd, u_int rupper, u_int rlower, 121 u_int bg) 122 { 123 rupper = grid_view_y(gd, rupper); 124 rlower = grid_view_y(gd, rlower); 125 126 grid_move_lines(gd, rupper + 1, rupper, rlower - rupper, bg); 127 } 128 129 /* Insert lines. */ 130 void 131 grid_view_insert_lines(struct grid *gd, u_int py, u_int ny, u_int bg) 132 { 133 u_int sy; 134 135 py = grid_view_y(gd, py); 136 137 sy = grid_view_y(gd, gd->sy); 138 139 grid_move_lines(gd, py + ny, py, sy - py - ny, bg); 140 } 141 142 /* Insert lines in region. */ 143 void 144 grid_view_insert_lines_region(struct grid *gd, u_int rlower, u_int py, 145 u_int ny, u_int bg) 146 { 147 u_int ny2; 148 149 rlower = grid_view_y(gd, rlower); 150 151 py = grid_view_y(gd, py); 152 153 ny2 = rlower + 1 - py - ny; 154 grid_move_lines(gd, rlower + 1 - ny2, py, ny2, bg); 155 grid_clear(gd, 0, py + ny2, gd->sx, ny - ny2, bg); 156 } 157 158 /* Delete lines. */ 159 void 160 grid_view_delete_lines(struct grid *gd, u_int py, u_int ny, u_int bg) 161 { 162 u_int sy; 163 164 py = grid_view_y(gd, py); 165 166 sy = grid_view_y(gd, gd->sy); 167 168 grid_move_lines(gd, py, py + ny, sy - py - ny, bg); 169 grid_clear(gd, 0, sy - ny, gd->sx, py + ny - (sy - ny), bg); 170 } 171 172 /* Delete lines inside scroll region. */ 173 void 174 grid_view_delete_lines_region(struct grid *gd, u_int rlower, u_int py, 175 u_int ny, u_int bg) 176 { 177 u_int ny2; 178 179 rlower = grid_view_y(gd, rlower); 180 181 py = grid_view_y(gd, py); 182 183 ny2 = rlower + 1 - py - ny; 184 grid_move_lines(gd, py, py + ny, ny2, bg); 185 grid_clear(gd, 0, py + ny2, gd->sx, ny - ny2, bg); 186 } 187 188 /* Insert characters. */ 189 void 190 grid_view_insert_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg) 191 { 192 u_int sx; 193 194 px = grid_view_x(gd, px); 195 py = grid_view_y(gd, py); 196 197 sx = grid_view_x(gd, gd->sx); 198 199 if (px >= sx - 1) 200 grid_clear(gd, px, py, 1, 1, bg); 201 else 202 grid_move_cells(gd, px + nx, px, py, sx - px - nx, bg); 203 } 204 205 /* Delete characters. */ 206 void 207 grid_view_delete_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg) 208 { 209 u_int sx; 210 211 px = grid_view_x(gd, px); 212 py = grid_view_y(gd, py); 213 214 sx = grid_view_x(gd, gd->sx); 215 216 grid_move_cells(gd, px, px + nx, py, sx - px - nx, bg); 217 grid_clear(gd, sx - nx, py, px + nx - (sx - nx), 1, bg); 218 } 219 220 /* Convert cells into a string. */ 221 char * 222 grid_view_string_cells(struct grid *gd, u_int px, u_int py, u_int nx) 223 { 224 px = grid_view_x(gd, px); 225 py = grid_view_y(gd, py); 226 227 return (grid_string_cells(gd, px, py, nx, NULL, 0, 0, 0)); 228 } 229